/* eslint-disable no-unreachable */
<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card class="box-card">
            <!-- 警告区域 -->
            <el-alert
                title="注意: 只允许为第三级分类设置相关参数!"
                type="warning" :closable="false"
                :show-icon="true">
            </el-alert>
            <!-- 选择商品分类区域 -->
            <el-row class="cat_opt">
                <el-col>
                    <span>选择商品分类: </span>
                    <!-- 选择商品分类级联框 -->
                    <el-cascader
                        v-model="selectedCateKeys"
                        :options="catelist"
                        :props="cateProps"
                        @change="handleChange">
                    </el-cascader>
                </el-col>
            </el-row>
                <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <!--添加动态参数面板  -->
                <el-tab-pane label="动态参数" name="many">
                    <!-- 添加参数的按钮 -->
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
                    <!-- 动态参数表格 -->
                    <el-table :data="manyTableData" border stripe>
                        <!-- 展开行 -->
                        <el-table-column type="expand">
                            <template slot-scope="scope">
                                <!-- 循环渲染Tag标签 -->
                                <el-tag v-for="(item, i) in scope.row.attr_vals"
                                 :key="i" closable @close="handleClose(i,scope.row)">
                                    {{item}}
                                </el-tag>
                                <!-- 可输入Tag标签 -->
                                <el-input
                                class="input-new-tag"
                                v-if="scope.row.inputVisible"
                                v-model="scope.row.inputValue"
                                ref="saveTagInput"
                                size="small"
                                @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)">
                                </el-input>
                                <!-- 添加按钮 -->
                                <el-button v-else class="button-new-tag"
                                size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <!-- 索引列 -->
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button type="primary" size="mini"  icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                                <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
                <!-- 添加静态属性面板 -->
                <el-tab-pane label="静态属性" name="only">
                    <!-- 添加属性的按钮 -->
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
                    <!-- 静态参数表格 -->
                    <el-table :data="onlyTableData" border stripe>
                        <!-- 展开行 -->
                        <el-table-column type="expand">
                            <template slot-scope="scope">
                                <!-- 循环渲染Tag标签 -->
                                <el-tag v-for="(item, i) in scope.row.attr_vals"
                                 :key="i" closable @close="handleClose(i,scope.row)">
                                    {{item}}
                                </el-tag>
                                <!-- 可输入Tag标签 -->
                                <el-input
                                class="input-new-tag"
                                v-if="scope.row.inputVisible"
                                v-model="scope.row.inputValue"
                                ref="saveTagInput"
                                size="small"
                                @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)">
                                </el-input>
                                <!-- 添加按钮 -->
                                <el-button v-else class="button-new-tag"
                                size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <!-- 索引列 -->
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button type="primary" size="mini"  icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                                <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
            </el-tabs>
        </el-card>
        <!-- 添加参数对话框 -->
        <el-dialog
        :title="'添加'+ titleText"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed">
        <el-form  :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
                <el-input v-model="addForm.attr_name"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
        </el-dialog>

        <!-- 修改参数对话框 -->
        <el-dialog
        :title="'修改'+ titleText"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed">
        <el-form  :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
                <el-input v-model="editForm.attr_name"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
    // 商品分类列表
      catelist: [],
      // 级联选择框配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        expandTrigger: 'hover'
      },
      // 级联选择框双向数据绑定到的数组
      selectedCateKeys: [],
      // 被激活的页签名称
      activeName: 'many',
      // 动态参数的数据
      manyTableData: [],
      // 静态属性的数据
      onlyTableData: [],
      // 控制添加对话框的显示与隐藏
      addDialogVisible: false,
      // 添加参数的表单数据对象
      addForm: {
        attr_name: ''
      },
      // 添加表单验证规则对象
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      },
      // 控制修改对话框的显示与隐藏
      editDialogVisible: false,
      // 修改的表单数据对象
      editForm: {
        attr_name: ''
      },
      // 修改表单的验证规则对象
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      }
      // 控制按钮与文本框的切换显示
    //   inputVisible: false,
      // 文本框中输入内容
    //   inputValue: ''
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    //   获取所有商品分类数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败!')
      }
      // console.log(this.catelist)
      this.catelist = res.data
    //   console.log(this.catelist)
    },
    // 级联选择框选中项变化,会触发这个函数
    handleChange () {
    //   console.log(this.selectedCateKeys)
      this.getParamsData()
    },
    // tab页签点击事件的处理函数
    handleTabClick () {
    //   console.log(this.activeName)
      this.getParamsData()
    },
    // 获取参数的列表数据
    async getParamsData () {
    //   console.log(this.selectedCateKeys)
    // 证明选中的不是三级分类
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        // 选择二级分类情况列表
        this.manyTableData = []
        this.onlyTableData = []
        return false
      }
      //   证明选中的是三级分类
      // console.log(this.selectedCateKeys)
      // 根据所选分类的Id,和当前处理的面板,获取对应的参数
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
        params: { sel: this.activeName }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败!')
      }
      console.log(res.data)

      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // 控制文本框的显示与隐藏
        item.inputVisible = false
        // 文本框中输入的值
        item.inputValue = ''
        // debugger
      })

      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    // 监听对话框关闭事件,重置表单
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮添加参数
    addParams () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return false
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })

        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败!')
        }

        this.$message.success('添加参数成功!')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    // 点击按钮,展示修改对话框
    async showEditDialog (attr_id) {
    //   console.log(attr_id)
      // 查询当前参数信息
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,
        { params: { attr_sel: this.activeName } })

      if (res.meta.status !== 200) {
        return this.$message.error('获取信息参数失败!')
      }

      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 重置修改的表单
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 点击按钮,修改参数信息
    editParams () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return false
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName })

        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败!')
        }

        this.$message.success('修改参数成功!')
        this.getParamsData()
        this.editDialogVisible = false
      })
    },
    // 根据id删除对应参数项
    async removeParams (attr_id) {
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 用户取消了删除操作
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除!')
      }

      // 删除的业务逻辑
      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败!')
      }

      this.$message.success('删除参数成功!')
      this.getParamsData()
    },
    // 文本失去焦点,或者摁下了Enter都会触发
    handleInputConfirm (row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return false
      }
      // 如果没有return, 则证明输入的内容,需要做后续处理
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      // 需要发起请求,保存这次操作提取到saveAttrVals函数
      this.saveAttrVals(row)
    },

    // 将对attr_vals的操作,保存到数据库
    async saveAttrVals (row) {
    // 需要发起请求,保存这次操作
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(' ')
        })

      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败!')
      }

      this.$message.success('修改参数项成功!')
    },
    // 点击按钮,展示文本输入框
    showInput (row) {
      row.inputVisible = true
      // 让文本框自动获得焦点
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 删除对应标签参数可选项
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    //   if (res.meta.status !== 200) {
    //     return this.$message.error('删除失败!')
    //   }
    //   this.$message.success('删除参数成功!')
    }
  },
  computed: {
    isBtnDisabled () {
    // 如果按钮需要被禁用,则返回true,否则返回false
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    // 当前选中的三级分类的id
    cateId () {
      if (this.selectedCateKeys.length === 3) {
        // console.log(this.selectedCateKeys)
        // console.log(this.selectedCateKeys[2])
        return this.selectedCateKeys[2]
      }
      return null
    },
    // 动态计算标题的文本
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang="less" scoped>
.cat_opt {
    margin: 15px 0;
}
.el-tag {
    margin:10px;
}
.input-new-tag {
    width: 120px;
}
</style>
